Cylindrical drier and cooler



a. Mc CRAE. CYLINDRICAL DRIER AND COOLER.

APPLICATION FILED OCT-6. I920- 1,409,350. PatehtedMar.14,'19 22.

INVEN'I'DR;

UHTED STAE' GECRGE MCGRAE, OF BRANTFORD, ONTARIO, CANADA.

GYLINDRIGAL DRIER AND coonnn.

Specification of Letters Patent. Patented Plan 14, 192 2.

Application filed October 6, 1920. Serial No. 415,200.

To all whom it may concern:

Be it known that I, GEORGE MoGRAn, of the city of Brantford, in the county of Brant, Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain new and useful Improvements-in Cylindrical Driers and Coolers, of which the following is a specification.

This invention relates to cylindrical devices, usually rotary, through which materials to be dried or cooled are passed, and are tumbled or lifted and dropped to expose them fully to the drying or cooling air pass- .ing through the device; Ordinarily the shells of such apparatus are formed of lapped and riveted plates, and my object is to devise a construction of shell which will be stiffer, stronger and lighter than the ordidescribed and is illustrated in the accom panying drawings in which Fig. 1 is a side elevation, partly broken away, of a cylindrical drier or cooler constructed in accordance with my invention;

Fig. 2 a cross section of the same; and

Fig. 3 a longitudinal section of part of the same. 7

In the drawings like numerals of reference indicate corresponding parts in the different figures.

The cylindrical heat transferring device,

.as will be seen from Fig. 1 ofthe drawings,

is in general of ordinary type and is shown as adapted for rotation, 1 being the circular tracks commonly employed and '2 a gear N 5 orrica.

whereby power may be appliedto rotate the device, Of course, any ordinary gearing may be employed for this purpose. As indicated particularly in Figs. 2 and 3 of the drawings, the device, instead of being made of lapped and riveted plates, is formed of a plurality of longitudinal sections 3, each section being provided along each of its straight edges with a radial flange 4, these flanges extending outwardly a suflicient distance to provide suitable space for the bolts or rivets bywhich they are secured together.

Preferably also the flanges 4 extend in wardly as well as outwardly, as shown particularly in Figs. 2 and 3, thus providingadditional longtiudinal stiffness for'the de-= vice as well as forming flights or lifting flanges for the t-umblingand lifting ofthe material on which the device is tooperate.

flanges may also be used for the supporting additional flights.

What I claim as my invention is 1. A cylindrical heat transferring device purpose of an outwardly extending flange formed along each straight edge abutting a similar flange on an adjacent section and secured thereto.

2. A cylindrical heat transferring device having a metal shell formed of a plurality oflongitudinal sections, each section having an outwardly and inwardly extending flange formed along each straight edge abutting a similar flange on an adjacent section and secured thereto. a

Signed at city of Brantford this 19th day of August 1920. g V

GEORGE MoCRAE.

These inwardly projecting portions-of the' having a metal shell formed of a plurality r of longitudinal'sections, each section having 

